HP Tuners for DFM Delete/Disable?

SPASierra · February 2, 2022

Has anyone here purchased and used HP tuners for disabling DFM? There are some YT videos on it, but they all seem to be for pre 2019 models. The HP Tuners website lists the 19-21 5.3 as a programmable option, but doesn't say what can be programmed. I am going to reach out to HP Tuners when I get a chance, but figured I would check to see if anyone of you have done this.

BRPRacer · February 3, 2022

You have to send the ECU to HPTuners to be permanently unlocked before any tuning can be done. But once that is done you can turn in or off just about every function in the ecu.

Edited February 3, 2022 by BRPRacer

SPASierra · February 3, 2022

10 hours ago, BRPRacer said:

You have to send the ECU to HPTuners to be permanently unlocked before any tuning can be done. But once that is done you can turn in or off just about every function in the ecu.

Thanks BRPRacer! I was doing some reading through their forums, and it appears that once unlocked, the dealer can no longer reflash the ECU. I'm not sure that is a route I want to take while under warranty. Maybe the Pulsar LT is a better option for me. I have a Range AFM/DFM disabler, but I have kicked it loose a couple of times and the case is separating from the plug. I want something that is out of the way. For the price of the Range I have broken, buying another one already puts me in Pulsar territory and I get more functionality. I think that is probably my best route.

Hotwheel · February 3, 2022

If the only thing you want to do is disable AFM/DFM this is a great disabling devise, just plug it in drives like a different truck. https://www.amazon.com/gp/product/B00BR1R8N8/ref=ppx_yo_dt_b_asin_title_o03_s00?ie=UTF8&th=1

TNTSierra · February 3, 2022

^^^^^WITH ABOVE STATEMENT^^^^^^

Do people read for comprehension on this site? He already stated he had the Range device! He also stated that he has hit it a few times with his leg getting in and out of the vehicle.

Edited February 6, 2022 by TNTSilverado

Nick__ · February 7, 2022

On 2/3/2022 at 8:54 AM, SPASierra said:

Thanks BRPRacer! I was doing some reading through their forums, and it appears that once unlocked, the dealer can no longer reflash the ECU. I'm not sure that is a route I want to take while under warranty. Maybe the Pulsar LT is a better option for me. I have a Range AFM/DFM disabler, but I have kicked it loose a couple of times and the case is separating from the plug. I want something that is out of the way. For the price of the Range I have broken, buying another one already puts me in Pulsar territory and I get more functionality. I think that is probably my best route.

I would absolutely recommend the Pulsar LT. I adjusted my throttle response, increased the speed limiter, adjusted speedo for tire size and disabled DFM on my 6.2. Drives like it should have from the factory. If you use the chat function on Realtruck.com, they'll give you a better price than what's listed and they price match. I got mine for around $430 before tax.

SPASierra · February 25, 2022

Thanks Nick. I ended up ordering and installing the Pulsar a couple of weeks ago. Wow, what a difference! All I can say now is that I am suspect that the AFM/DFM disabler was ever really working. (at least after I kicked it loose the first time). This thing definitely made it run like it should have from the factory. I didn't even bother adjusting the throttle response. I disabled auto stop/start, disabled DFM, and bumped the speed limiter a bit.